/**
 * Given a 2D binary matrix filled with 0's and 1's, find the largest square containing only 1's 
 * and return its area.For example, given the following matrix:
 * 
 * 1 0 1 0 0
 * 1 0 1 1 1
 * 1 1 1 1 1
 * 1 0 0 1 0
 * 
 * Return 4.
 */
/**
 * @author I321035
 *
 */
package problem221_Maximal_Square;